Wednesday, December 21, 1983 at 8:05 PM
1983-12-21 12:05 UTC · -28.190°, -63.172°
Magnitude
6.9 mw
Major
Depth
602 km
Deep
Energy
337.6 kilotons of TNT
Gutenberg–Richter
Coordinates
-28.190°, -63.172°
Felt reports
—
Tsunami
No
Source
USGS
Region
—
Can cause serious damage over larger areas.
At 602 km this was a deep earthquake. Deep quakes are felt over very large areas but rarely cause surface damage.
This event sits in the Major range of the moment magnitude scale.
Nearest mapped structure: Philippine Trench (~17325 km away). Last major event: 2012 Samar Earthquake (M7.6).
Area seismic-hazard score: 8/100 (low).
2 recorded M4.0+ events within 326 km in the 90 days after this earthquake.
No other recent earthquakes nearby.
Browse all earthquakes →Data from USGS. Magnitudes and locations are preliminary and may be revised. For official information consult PHIVOLCS / USGS.